The importance of intruder states in 114Cd

The origin and decay properties of levels in 114Cd, with special emphasis on the quintuplet of states around 1.2 MeV excitation energy, are investigated both theoretically and experimentally. An almost complete set of reduced transition probabilities B(E0) and B(E2) is established by means of (n, γ) and (n, e-) spectroscopy. Configuration mixing between vibrational-like and rotational-like states, extracted from proton two-particle-two-hole (2p-2h) core coupling calculations, is found to be crucial for explaining the peculiar level properties. (orig.)